A delivery system for an oral care substance using a permanently deformable strip of material
CA 2618252 A1 · Owner: Tweddell, Richard, Iii · Inventors: Dirksing, Robert Stanley; Sagel, Paul Albert; Tweddell, Richard, Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A delivery system for an oral care substance such as a tooth whitening substance , includes a strip of material having a yield point and thickness such that the strip of , material substantially conforms to a shape of a tooth and its adjoining soft tissue via , permanent deformation under a pressure less than about 250,000 Pascals when the , delivery system is placed thereagainst. The delivery system also includes an oral care , substance applied to the strip of material such that when the delivery system is placed on , a surface of the tooth and its adjoining soft tissue the substance contacts , the surface , providing an active onto the surface. The substance also provides adhesive …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed August 4, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 4, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.